The ${\bar c} c$ purity of $ψ(3770)$ and $ψ'$ challenged
| dc.creator | Voloshin, M. B. | |
| dc.date | 2005-04-21 | |
| dc.date.accessioned | 2026-07-07T10:29:29Z | |
| dc.date.available | 2026-07-07T10:29:29Z | |
| dc.description | It is suggested that the resonance $ψ(3770)$ may contain a sizeable ($O(10%)$ in terms of the probability weight factor) four-quark component with the up- and down- quarks and antiquarks in addition to the $c {\bar c}$ pair, which component in itself has a substantial part with the isospin I=1. Furthermore such four-quark part of the wave function should also affect the properties of the $ψ'$ charmonium resonance through the $ψ(3770) - ψ'$ mixing previously considered in the literature. It is argued that an admixture of extra light quark pairs can explain a possible discrepancy between the theoretical expectations and the recent data on the non-$D {\bar D}$ decay width of the $ψ(3770)$ and the ratio of the yield of charged and neutral $D$ meson pairs in its decays, as well as on the extra rate of the $ψ'$ direct decay into light hadrons and the rate of the decay $ψ' \to π^0 J/ψ$. It is further argued that the suggested four-quark component of the wave function of the $ψ(3770)$ should give rise to a measurable rate of the decays $ψ(3770) \to ηJ/ψ$ and $ψ(3770) \to π^0 J/ψ$. | |
| dc.description | 13 pages | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0504197 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0504197 | |
| dc.identifier | Phys.Rev.D71:114003,2005 | |
| dc.identifier | doi:10.1103/PhysRevD.71.114003 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177819 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | The ${\bar c} c$ purity of $ψ(3770)$ and $ψ'$ challenged | |
| dc.type | text |